Boiler



PATENTED FEB. 23, 1904.

J. GOLLIS.

BOILER. I APPLICATION FILED JAN. 20. 1903.

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PATENTED FEB. 23, 1904. J. GOLLIS.

BOILER.

APPLIOATION FILED JAN. 20. 1903.

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No. 752,758. PATENTED FEB. 23, 1904. J. GOLLIS. BOILER-v APPLIOATIQNFILED JAN. 20. 1903.

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PATENTED FEB. '23, 1904.

J. GOLLIS.

BOILER. APILIOATION FILED JAN. 20. 1903.

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Patented February 23, 1904.

UNI-TED STATES PATENT OFFICE.

JOHN COLLIS, or DES MOINES, IOWA.

BQILER.

SPECIFICATION forming part of Letters Patent No. 752,758, dated February23, 1904. Application filed January 20, 1903. Serial No.'139,'767. (110'model.)

To all whom it may concern.-

Be it known that I, JOHN CoLLIs, a citizen of the United States,residing at Des Moines, in the county of Folk and State of Iowa, haveinvented certain new and useful Improvements in Boiler-Furnaces, ofwhich the following is a specification.

The objects of my invention are to provide a boiler-furnace of simple,durable, and inexpensive construction, in which the water is containedbetween metal walls so arranged as to provide a maximum ofheating-surface and yet to provide a structure that will have greatstrength in resistance of the internal strains and all of the parts ofthe heatingsurface will be readily and quickly accessible for purposesof cleaning or repairing.

My invention consists in certain details in the construction,arrangement, and combination of the various parts of the device where'-by the objects contemplated are attained,-as hereinafter more fully setforth, pointed out in my claims, and illustrated in the accompanyingdrawings, in which Figure 1 shows a vertical central longitudinalsection of the complete furnace with the inclosing walls omitted. Fig. 2shows avertical transverse sectional view on the indicated line 2 2 ofFig. 1 with the inclosing walls in position. Fig. 3 shows a verticallongitudinal sectional View of a slightly-modified form of boilerthrough the indicated line 3 3 of Fig. 4. Fig. 4 shows a front elevationof the modified form of boiler shown in Fig. 3. Fig. 5 shows a verticaltransverse sectional view on the indicated line 5 5 of Fig. 3. Fig. 6shows a vertical longitudinal central sectional view of anothermodification. Fig. 7 shows a horizontal sectional View of theboiler-front detached, said view being taken on the indicated line 7 7of Fig. 6; and Fig. 8 shows an enlarged detail view illustrating thehand-hole covering for the boiler en s.

Referring to the accompanying drawings, I shall first describe theconstruction of the shell forming the body portion of theboiler. Thisshell is preferably made of boiler metal. The top sheet of itat 10issemicircular in cross-section and extends the full'length of theboiler. The sides of the outer portion are vertical at 11. These sidesare turned inwardly at 12 and then upwardly at 13, parallel with theparts 11, and the top of the interior of the boiler is substantiallysemicircular-at 14. The ends of the boiler thus formed between the innerand outer sheets are provided with boiler-heads 15,- securely held inplace by rivets or otherwise. I provide means for bracing the sheetsrelative to each other by means of the partitions 16, which extendlongitudinally of the boiler and which are arranged at suitabledistances apart and are perforated at 17, so that the circulation ofwater through the boiler, is not impeded, and in addition to this Iprovide a series of transverse bolts 18, extending through the parallelparts of the boiler, and between the sheets of the boiler are tubularbraces 19, the ends of which engage the inner surfaces ofthe sheets, andthe said tubes surround the bolts 18,

thereby preventing expansion or contraction of the sheets relative toeach other. I am aware that this portion of my boiler-furnace is notnew,and I do not desire to be understood as claiming this portion of theboiler by itself.

I shall next describe the means whereby the ends of the boiler areclosed. The boiler ends are substantially independent boiler-sections,preferably made of cast metal and having an exterior contour designed tofit inside of the inner sheet of the boiler ends. These are of a length,however, materially less than the vertical dimension of the body portionof the boiler. The boiler-front is indicated by the reference-numeral 20and is hollow. At the rear of the boiler is a corresponding part 21.I'support these parts in position and at the same time provide forcirculation from the boiler front and rear portions to the boiler bodyportion as follows: The numeral 22 indicates a pipe communicating withthe boilerfront. 23 indicates a pipe communicating with the pipe 22 andextending Vertical, and 24 indicates a pipe communicating between thepipe 23 and the body portion of the boiler. At the lower end of each ofsaid front and rear boiler-sections are two pipes 25, communicating withthe boiler-sections and also with the pipes 26, which pipes inclinedownwardly and outwardly and communicate with the pipes 27, which openinto the body portions of the boiler, at the lower ends thereof. By thismeans the boiler-sections 20 and 21 are supported in position. portionof the boiler may freely circulate through the boiler portions 20 and21, and a contraction and expansion of the boiler parts will have nodisastrous effects, because the communicating pipes are provided withelbows which may yield enough to permit such contraction and expansionof the boiler-sections.

In addition to theboiler-sections just described I provide a hollowcast-metal bridgewall 28, shaped to fit the interior of the body portionof the boiler. This hollow bridgewall is preferably of cast metal and isheld in position by means of the pipes 29, communieating with its lowerportion and extending rearwardly and then outwardly and entering thebody portion of the boiler as near the lower end thereof as ispracticable, and in addition to this a pipe communicates with the uppercentral portion of the bridge-wall and inclines upwardly and rearwardlyand enters the top'portion of the boiler-body. Hence the bridge-wall isfirmly supported, and the contraction and expansion of the parts willnot operate to sever its fastening to the body portion of the boiler,and a circulation of the water through the bridge-wall is provided for.Arranged on the exterior of the boiler-body are the horizontalpartitions 31, extending from a point near the front of the boiler-bodyto the wall 32, some distance in the rear of boiler, and the partitions31 extend outwardly to the side walls 33. By this means the products ofcombustion are made to pass from the grate upwardly and rearwardly overthe bridge-wall, then downwardly and rearwardly through the rear end ofthe boiler, then outwardly, laterally, and forwardly under thepartitions 31 to a point near the furnace-front, and then upwardly andrearwardly between the partitions 31 and the top of the furnace to apoint of discharge.

In the form shown in Figs. 1 and 2 I have provided a number ofpartitions extending both vertically and horizontally, said partitionsbeing indicated by the reference-numeral 34, and the said partitions areprovided with openings 35, through which the water may freely circulate.In the form shown in Figs. 1 and 2 I use a comparatively low hollowbridge-wall, (indicated by the numeral 36,) and this bridge-wall isconnected with the boiler-body by means of the pipes 37 and 38.

This low bridge-wall leaves a space above the bridge-wall and betweenthe boiler-heads for I the tubes 39, and these tubes enter independcutchambers in the boiler-heads formed by the partitions 34. In each of theboiler-heads I have provided an opening 40 in line with eachboiler-flue, and these openings are de- The water in the body signed tobe closed by an inside plate 41, provided with a hook 42. 43 is across-piece to extend across the opening 40 and rest on the outersurface of the boiler-front 20, and 44 is a" bolt passed through thecross-piece and detachablyconnected with the hook 42. When it is desiredto remove the plate 41, the nut on the bolt is loosened and thecross-piece 43 removed far enough to permit the plates 41 to be drawn,'so that access may be provided to the interior of the boiler-front.This device just described is simply an ordinary hand-hole covering, andI do not claim anything new in its construction. It is obvious that bythis arrangement of parts access may be had to the boiler-tubes to cleanthem. In the form shown in Figs. 1 and 2 I have also provided asuperheating dome 45, arranged above the boilerbody and communicatingtherewith through the pipes 46 and 47 and having the steamservi'ce pipe48 communicating with its top.

In the modified form shown in Fig. 6 I have provided means whereby theform of boiler illustrated in Fig. 3 may be adapted for use inconnection with the boiler-tubes, as follows: The boiler-front 20 isprovided with a number of horizontal partitions 49 and boilertubes 50,communicating between the boilerfront 20 and the hollow bridge-wall 28.I provide openings 57 in the front of the boilersection 20 and in therear of the hollow bridgewall 28 to provide access to the ends of theboiler-tubes. In other respects this modification (shown in Fig. 6) isthe same as that shown in Fig. 3.

In Fig. 7 of the drawings I have illustrated in sections aslightly-modified form of the boiler-front in which the rear of theboilerfront is corrugated at 52, so as to provide a largerheating-surface.

It is to be understood in this connection that each of the severalmodifications of my improved boiler is to-be used in connection with.the ordinary inclosing furnace-walls and .the horizontal partitions 31,so that the products of combustion from the grate will pass firstlongitudinally through the interior of the boiler and then in engagementwith the lower outer surface of the boiler, and finally pass over theupper outer surface of the boiler before discharging into the flue.Furthermore, a strong and compact boiler is provided in which provisionis made for a contraction and expansion of parts, so that suchcontraction and expansion will not tend to break the boiler-sectionsapart or to disconnect the pipes that provide for the circulation of thewater between the various boiler-sections.

Having thus described my invention, what I claim, and desire to secureby United States Letters Patent therefor, is-

1. The combination with a double-walled, boiler, body-section having thetop and sides, and end pieces for closing the space between the walls atthe ends thereof, of a hollow end boiler-section shaped to fit into oneend of the boiler-body, and pipes communicating between the endboiler-section and the body boiler-section, one pipe projectingoutwardly from the top portion of the end boiler-section then upwardlyand then into the body boilers section and two pipes extending outwardlyfrom the lower end portion of the end section, then downwardly andoutwardly and then inwardly to the bottom portion of the body portion, ahollow bridge-wall, a pipe communicating with the top portion of thehollow bridge-wall projecting upwardly and rearwardly and communicatingwith the inner top portion of the body boiler-section and two pipescommunicating with the lower end portion of the hollow bridge-wall andprojecting rearwardly and communicating with the lower portion of thebody boiler-section.

2. The combination with a double-walled, boiler, body-section having thetop and sides, and end pieces for closing the space between the walls atthe ends thereof, of a hollow end boiler-section shaped to fit into oneend of the boiler body, and pipes communicating between the endboiler-section and the body boiler-section, said pipes extending firstoutwardly from the boiler-sections then substantially parallel with theboiler end, a hollow bridge wall and pipes communicating with theinterior of the bridge-wall and projecting rearwardly and communicatingwith the body portion, and boiler-tubes communi cating at their endswith the front end section and the bridge-wall, said front section andbridge-wall having openings therein in line with the tubes to provideaccess to the tubes.

3. The combination with a double-walled boiler body-section having topand sides, of a hollow end boiler-section placed in the upper portion ofone end of the boiler, pipes attached to the end section extendedupwardly and attached to the body portion and providing communicationbetween said end and body portions, and pipes extended from the endsection downwardly and attached to the body portion and also providingcommunication between said end and body portions, said pipes supportingthe end in its elevated position.

4. The combination with a double-walled boiler body-section having topand sides, of a hollow end boiler-section placed in the upper portion ofone end of the boiler, pipes attached to the end section extendedupwardly and attached to the body portion and providing communicationbetween said end and body portions and pipes extended from the endsection downwardly and attached to the body portion and also providingcommunication between said end and body portions, said pipes supportingthe end in its elevated position, a hollow bridge-wall and pipescommunicating between it and the hollow body and supporting thebridge-wall in position.

5. The combination with a double-walled boiler body-section having topand sides, and end pieces for closing the space between the walls at theends thereof, of a hollow end boiler-section shaped to fit into one endof the boiler-body, and pipes communicating between the endboiler-section and the body boiler-section, one pipe projectingoutwardly from the top portion of the end boiler-section then upwardlyand-then into the body boiler

